I checked the balance on the private key (the one with the smallest amount), 0 BTC, address never used. Then I checked it based on it's legacy public address, again 0 BTC.
I haven't checked the segwit address because I have no way to get the segwit public wallet from a private key.
To get the legacy public wallet from the private key I used the old brainwallet javascript web site. Know of any javascript sites that work offline to calculate the segwit address from the private key?

When you start mixing there is a clear notice that new Segwit is now used in Chipmixer so you can't expect to get coins on legacy anymore.
Easiest way is to use Electrum wallet for importing private key and I would suggest that, but I saw some people are using open source offline version of segwitaddress.org for generating segwit addresses from priv keys, however I can't vouch for this so you it at your own risk.